Charter said he and other organizers targeted the Nationals game because President Trump was slated to throw the opening pitch.

They were planning to unroll the banner when the president was on the field. Trump canceled, though, and Americans Take Action unrolled the banner just before the game ended.

They didn't stay to see the results for fear of being arrested.

"He wasn't there today because he was scared," Charter said, "There needs to be an independent investigation into his ties to Russia, and when there is — maybe Mike Flynn's testimony will be the nail in the coffin — we think he'll be impeached. It'll probably happen in the next six months."

Blake Montgomery is a reporter for BuzzFeed News and is based in San Francisco.